Flame-spreader.



J. H. WINDEMULLER.

FLAME SPREADER APPLICATION FILED NOV. 25, 1911.

Patented Aug. '6, 1912.

UNITED STATES PATENT OFFICE.

JANHENDRIK WINDEMULLER, or ROTTERDAM, NETHERLANDS.

FLAME-SPREADER.

Specification of Letters Patent. Application filed November 25, 1911. Serial No. 662,477.

Patented Aug. 6, 1912.

To. all whom it may concern:

Be it known that I, JAN HENDRIK WINDEMULLER, a subject of the Queen of the Netherlands, and residing at 16 Spoorsingel, Rotterdam, in the Province of Holland, in the Kingdom of the Netherlands, having invented certain new and useful Improvements in and Relating to FlameSpre aders, do hereby declare that the following is a specification.

This invention relates to a method of spreading flames by retarding thecontact of .the mixture of air and gas with the combustion'air by surrounding the burner tube near the gas issue openings with a screen, ring, cup or shell (hereinafter referred to as a screen) adapted to preventcombustion from taking place within the said screen, the coldest zone of the flame being at the edge of the screen, which thus conducts a minimum amount of heat.

.llhe invention will now be described with reference to the accompanying drawings in which all the fi ures are vertical sections through the longitudinal axis of the burners.

Figure 1 is an ordinary gas burner to the side of which a partial screen has been applied; Fig. 2 is an ordinary Bunsen burner the upper part of which is provided with a circular horizontal screen; Fig. 3 is a Bunsen mushroom burner having lateral apertures provided with a screen whose vertical section is in the form of a U; Fig. 4 is a mushroom Bunsen burner with lower apertures and provided on one side with a screen of vertical section in the form of a U of comparatively small depth, and on the other side with a screen of similar section but much deeper; Fig. 5 is a Bunsen mushroom burner with lateral apertures and provided with a screen of vertical section in the form 2 the coldest zone of the flame, 3 is of a U of relatively small depth but large diameter. The first four figures illustrate burners intended more particularly for lighting; Fig. 5 represents a burner for tube 1. In Fig. 4 the burner headis mounted upon the burner tube 1". In Fig. 5 the burner head is mounted upon the burner tube 1. v

In Fig. 3, 7 is a mushroom burner having lateral apertures, 8 is a screen of vertical section in the form of a U mounted on the burner.

In Fig. 4, 9 is a mushroom burner having apertures underneath; 10 is a half screen in vertical section having the form of a relatively shallow U. 11 is a half screen the vertical section of which has the form of a U notably deeper than the half screen 10. In Fig. 5, 12 is a mushroom burnenhaving lateral apertures. 13 is a screen the vertical section of which is in the form of a 'U of,

comparatively small depth but large diameter.

Experiment has shown that the flame of an ordinary burner expands laterally, and increases in height when a partial screen similar to 5 is provided on the burner 1. It has also been experimentally proved that the expanded flame always assumes a definite form whether the screen has the form shown in Fig. 5 or the forms shown in Figs. 3 and 4. With the same consumption of gas, however, a still more extended form is given to the flame shown in Fig. 5, if it be desired that it should act on a larger surface as is necessary for certain heatlng apparatus.

The forms shown in the drawings are solely given as examples, and may assume an infinity of aspects according to the dlfferent applications of the invention.

It is'proved that by means of the method hereinbefore set forth the saving of gas in heating wateris about 25%, in comparlson with good ordinary burners, while with 1ncandescent burners of the Auer type a s1m1- lar consumption of gas produces an increase in illumination varying from 50 I am aware that burners of various types are known in which at the outlet of the burner where ignition takes place an annular ring, flange or cup is provided for directing the flame in an upward direction, e. 9. against the mixingchamber or is adapted to be heated by the flame and serve to conduct heat to gas generating chambers so as to assist vaporization. My screen has no analogy with such constructions and its pur pose, which is of quite a different nature, is, as already stated, to retard the contact of the combustible fuel with the air for comlarly-arranged discharge openings, and

bustion, and displace the initial point of combustion.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

l. The combination of a burner tube, an enlarged burner head thereon having annuan imperforate cup-shaped shield about said burner head, said shield having a part at one side extending farther below the burner head than a part at the other side, said shield serving to prevent immediate access of air to the burner head, and thereby serving to enlarge the flame.

2. The combination of a burner tube, an enlarged burner head thereon having annularly arranged discharge openings in said enlargement, and an imperforate cup-shaped ate access of air to said discharge openings and thereby serving to enlarge the flame.

3. In a gas burner, the combination of a Bunsen tube having a gas-discharge opening, and a shield located below and extending outward laterally and Widely flaring from the gas discharge opening, to prevent the immediate access of air to the flame.

Dated this 15th day of November, 1911.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAN HENDRIK WINDEMULLER.

Witnesses:

En. AMAND, A. E. JUNIANNE. 

